© 2014 VMware Inc. All rights reserved My Slides from VMware vSphere: Optimize and Scale.

© 2014 VMware Inc. All rights reserved

My Slides from

VMware vSphere: Optimize and Scale

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Found at www.renright.com/work

PrepForVCP-DCV.zip (Prep for VCP)

VCAP-DCA.zip (Prep for VCAP)

vSphere_Perf.zip (Performance Documents)

Additional student materials

http://www.renright.com/work

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vSphere Management Assistant includes the following commands:

Esxcli (Both)

Resxtop (vMA) esxtop (SSH)

Svmotion (Both)

vicfg- commands (vMA)

esxcfg- commands (deprecated) (Both)

Vifs (vMA)

Vihostupdate (Cannot be used with ESXi 5.0 or later)

Vmkfstools (Both)

vmware-cmd (vMA)

vim-cmd (SSH)

vSphere Management Assistant & SSH Commands

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Use vim-cmd commands from ESI Shell or SSH

ESXi Shell & SSH

Get a list of VMs on a host vim-cmd vmsvc/getallvms

Unregister a VM vim-cmd vmsvc/unregister vmid

Delete a VM vim-cmd vmsvc/destroy vmid

Determine if a VM has a snapshot vim-cmd vmsvc/get.snapshot vmid

Take a snapshot of a VM vim-cmd vmsvc/snapshot.create vmid snapshot_name

Remove a snapshot of a VM vim-cmd vmsvc/snapshot.remove vmid

Get the current power state of a VM vim-cmd vmsvc/power.getstate vmid

Get the uptime for a VM vim-cmd vmsvc/get.summary vmid |grep uptimeSeconds

Power on a VM vim-cmd vmsvc/power.on vmid

Shutdown a VM vim-cmd vmsvc/power.shutdown vmid

Power off a VM esxcli vm process kill –w world_id vim-cmd vmsvc/power.off vmid

Reboot a VM vim-cmd vmsvc/power.reboot vmid

Reset a VM vim-cmd vmsvc/power.reset vmid

Upgrade VMware Tools in a VM vim-cmd vmsvc/tools.upgrade vmid

Display the IP address of a VM vim-cmd vmsvc/get.guest vmid |grep -m 1 "ipAddress = \""

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Use the esxcli command with the network vswitch standard namespace:

esxcli conn_options network vswitch standard cmd_options

Examples:

To set the maximum transmission unit size:

• esxcli –-server esxi02 network vswitch standard set --mtu=9000 --vswitch-name=vSwitch5

• esxcli network vswitch standard set –m 9000 –v vSwitch5

To set the Cisco Discovery Protocol status:

• esxcli –-server esxi02 network vswitch standard set --cdp-status=advertise --vswitch-name=vSwitch5

• esxcli network vswitch standard set –c advertise –v Switch5 (or –c listen , -c both, -c down)

• esxcfg-vswitch –B both vSwitch1

Setting Virtual Switch Attributes

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Use the esxcli command with the network vswitch standard namespace:

esxcli conn_options network vswitch standard cmd_options

Examples of using esxcli:

To create a standard switch:

• esxcli –-server esxi02 network vswitch standard add –-vswitch-name=vSwitch5 SSH: esxcfg-vswitch –a vSwitch5

To list information about a standard switch:

• esxcli –-server esxi02 network vswitch standard list–-vswitch-name=vSwitch5 SSH: esxcfg-vswitch -l

To delete a standard switch:

• esxcli –-server esxi02 network vswitch standard remove–-vswitch-name=vSwitch5 SSH: esxcfg-vswitch –d vSwitch5

You can also use the vicfg-vswitch command. See examples in the notes.

Listing, Creating, and Deleting Standard Switches

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Use the esxcli command with the network vswitch standard portgroup namespace:

esxcli conn_options network vswitch standard portgroup cmd_options

Examples:

To list port groups on all standard switches:

• esxcli –-server esxi02 network vswitch standard portgroup list

To add a port group to a standard switch:

• esxcli –-server esxi02 network vswitch standard portgroup add --portgroup-name=TestDev --vswitch-name=vSwitch5

• esxcli network vswitch standard portgroup add –p TestDev –v vSwitch5

To remove a port group from a standard switch:

• esxcli –-server esxi02 network vswitch standard portgroup remove --portgroup-name=“VM Network” --vswitch-name=vSwitch0

You can also use the vicfg-vswitch command. See examples in the notes.

Listing, Adding, and Removing Port Groups

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Device driver queue depth determines how many commands to a given LUN can be active at one time.

Set device driver queue depth size properly to decrease disk latency.

Qlogic adapters depth of queue is 64 (default)

Other brands depth of queue is 32 (default).

Maximum recommended queue depth is 64.

Set Disk.SchedNumReqOutstanding to the same value as the queue depth.

Device Driver Queue Depth

Set LUN queue depth to its maximum: 64.

ESXi 5.1 & earlier

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ESXi 5.5

To check the current value for a device,run the command:

esxcli storage core device list -d naa.xxx

Note: The value appears under No of outstanding IOs with completing worlds:

To modify the current value for a device,run the command

esxcli storage core device set -d naa.xxx -O Value

Where Value is between 1 and 256Source: KB Article 1258

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vscsiStats <options>

-l List running virtual machines and their world IDs (worldGroupID).

-s Start vscsiStats data collection.

-x Stop vscsiStats data collection.

-p* Print histograms, specifying histogram type.

-c Produce results in a comma-delimited list.

-h Display help menu for more information about command-line parameters.

-w Specify worldGroupID* Followed by all, ioLength, seekDistance, outstandingIOs, latency or interarrival (Case sensitive)

Running vscsiStats

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Configure the BIOS:

1. Check for latest BIOS version

2. Enable

H.A.V

Hyperthreading

NUMA

All Sockets

Enable NX/XD

3. Disable unused devices

USB, Serial, Parallel, etc

4. Set power management to OS controlled

5. Consider turning off Dynamic Voltage & Frequency Scaling

Intel SpeedStep or AMD PowerNow

VMware Best practices for configuring ESXi hosts

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VM “A” Boots up. Vmk assigns it memory pages.

VM “B” Boots up. Vmk assigns it memory pages.

How TPS Works

The vmkernel hashes each memory page.

If redundant pages are verified, then the vmkernel will map both hosts to the same pageThus freeing up pages and making more memory available

Memory pages on an ESXi host

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Example of ESXi Host with 512 GB of RAM

•Take the first 4 GB of RAM x 6% = 246 MB

•Next 4 to 12 GB is 8GB x 4 = 328 MB

•Next 12 to 28 GB is 16 GB x 2% = 328 MB

•Any amount above 28 GB x 1% Take 512 – 28 = 484 x 1% = 4842 MB

• Base Total 5742 MB

•If free memory is > 64% of base (5742 x 64% = 3098 MB Free) = High

•If free memory is between 32 & 64% of base then state is Soft

•If free memory is between 16 & 32% of base then state is Hard

•If free memory is less than 16% of base then state is Low

Example of Calculating MinFreePct

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VM Overhead

Prior to vSphere 5.0

vSphere 5.0 - 5.5

VM overhead is now swapped to vms-<VM-name>-1233434.vswp

© 2014 VMware Inc. All rights reserved My Slides from VMware vSphere: Optimize and Scale.

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Transcript of © 2014 VMware Inc. All rights reserved My Slides from VMware vSphere: Optimize and Scale.